oceColorsVelocity: Create colors suitable for velocity fields
Description
Create a set of colors for displaying velocity values,
based on the scheme devised by Kristen M. Thyng
in her cmcolor Python package
(available at https://github.com/kthyng/cmocean). The
color specifications were downloaded for use here
on 2015-09-29. To avoid changes in oce scripts,
more recent changes to cmcolor have not been
tracked; oceColorsClosure()
has an example of how to incorporate such changes.